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[Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support


From: Paul Brook
Subject: [Qemu-devel] Re: [RFC PATCH 4/7] ide: IOMMU support
Date: Wed, 14 Jul 2010 14:53:03 +0100
User-agent: KMail/1.13.3 (Linux/2.6.33-2-amd64; KDE/4.4.4; x86_64; ; )

> Memory accesses must go through the IOMMU layer.

No. Devices should not know or care whether an IOMMU is present.

You should be adding a DeviceState argument to cpu_physical_memory_{rw,map}. 
This should then handle IOMMU translation transparently.

You also need to accomodate the the case where multiple IOMMU are present.

Paul



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